Music theory reference

Chords

Chord structures, qualities, functions, and practical applications.

Topics

Developing reference

Major Triad

Understand the major triad, its authoritative three-note construction, stable major quality, and role in larger chords and harmony.

Developing reference

Minor Triad

Understand the minor triad, its authoritative three-note construction, minor quality, and role in scales, harmony, and larger chords.

Developing reference

Diminished Triad

Understand the diminished triad, its authoritative minor-third and diminished-fifth structure, and its unstable harmonic character.

Developing reference

Augmented Triad

Understand the augmented triad, its authoritative major-third and augmented-fifth structure, symmetry, and harmonic ambiguity.

Developing reference

Major Seventh Chord

Understand the major seventh chord, its authoritative four-note construction, close upper tension, and role in major harmony.

Developing reference

Dominant Seventh Chord

Understand the dominant seventh chord, its authoritative construction, internal tritone, and strong role in harmonic motion.

Developing reference

Minor Seventh Chord

Understand the minor seventh chord, its authoritative four-note construction, minor quality, and role across diatonic and modal harmony.